[PATCH RFC V2] hgweb: code selection without line numbers in file source view

[Alexander Plavin]

Forgot to add a couple of comments in the previous email. First, the
copying in the current hgweb also isn't good at all at firefox, so
probably the best way is to use 'just pre' variant from your page. And
last, if it's ok to use javascript for this,may be the easiest way is
just to remove the leading numbers from the clipboard on copy.